Brush.



OF ST. JOHN, NEW BRUNSWICK, CANADA, ASSIGNOB 0F SIIVIEON DESMOND PURDY,

ONE-HALF TO '1. S. SIMIVIS AND COMPANY, LIMITED, OF ST.-- JOHN, CANADA,A

' CORPORATION.

BRUSH.

Specification of Letters Patent. Patented July 2, 1912.

1912. Seria1 -No.G78,811.

Application filed February 20,

illustrated in Fig. 2. In this Condition the ferrule is subjected topressure in reducing dies, the action of which is to force in theannulus 12 toward the central abutment, preferably without imparting anyincline to the Walls of the outer annulus 12. This pressure tends toforce together the sides 13 of the central abutment, but this action iso osed at the upper end of the abutment by the strut member 14, with theresult that only the lower unsupported edges of the abutment are forcedtogether. This imparts a wedge shape to the abutment, with resultingpressure upon the bristles at the level of the strut member 14, so thatthey are vigorously confined between said member and the annulus 12.While this pressure upon the bristles above the butts is normallysufficient to retain the same in place, it will readily be appreciatedthat the fact that the butt ends of the bristles are normally enlarged,further serves to secure them in position, since the space between thestrut 14 and the annulus 12 has been materially constricted by thepassing of the ferrule through the reducing dies. A further advantage inthe construction is found in the fact that owing to the central aperturein the base, any tendency of the latter to buckle under the pressure ofthe reducing dies is entirely eliminated.

A modification of the construction is illustrated in Fig. 5 in which thestrut 14 is reinforced by a Wedge-shaped block 18 arranged within theabutment member and with its large end adjacent the strut 14. Thispermits the compression of the base 10 by the reducing dies, withoutbuckling, while at the same time reinforcing the strut 14 and addingrigidity to the abutment as a whole. Substantially the same result maybe secured by expanding the upper edge of the central abutment, insteadof by constricting its lower edge. This may be accomplished for exampleby forming this abutment without the strut piece 14, as illustrated inFig. 6. Here the abutment has the form of an annulus open at both ends.If a Wedge piece 18 be forced down into the abutment from above, it willpress outwardly the upper edges of the annulus, and thus serve to clampthe bristles in the channel at a point above the butts, as in theconstructions above described.

Additional length for the clamping faces To all whom it may concern: v 7

Be it known that I, Snrnon Dnsuonn PURDY, a citizen of the United Statesof America, and residing in the city of St. John, in the Province of NewBrunswick and Dominion of Canada, have invented a certain new andusefulBrush, of which the following is a specification.

My invention relates to brushes and particularly to brushes of the typein which the butt ends of the bristles are secured by a ferrule clampedthereon, the object of my invention being to provide an improved brushand method of manufacturing the same.

In the accompanying drawings, Figure 1 is a vertical section through abrush in which my invention is embodied in one form; Fig. 2 is a sectionthrough the bristle carrying ferrule before passage through reducingdies; Figs. 3 and 4 are plan views of oval and round ferrulesrespectively in which my invention is embodied; Fig. 5 is' a detailedvertical section through a modification; Fig. 6 is a similar view ofanother modification; Fig. 7 is a vertical section through a brushembodying my invention in another form; Fig. 8 is a detached sectionthrough the ferrule of this brush; and Fig. 9 is a section through aferrule of: a modified form.

In its simplest form my improved brush comprises, as illustrated inFigs. 1 to 4, a ferrule having a base 10 against which the butt ends ofthe bristles 11 are sea-ted, sides 12 forming an outer annulus and acentral abutment in the form of an annulus having sides 13 pressedinwardly from the base 10, while in the trough formed between saidabutment and the annulus 12, the bristles are confined. This centralabutment in the form referred to comprises an inner diaphragm or strutmember 14, the function of which will be hereinafter noted. The handle15 is secured to the brush head in any suitable manner, as for instance,by the metal band 16 which engages on the one hand above the upper edgeof the outer annulus 12, and on the other hand rests in the offset upperportion of the brush handle to which it is secured by nails 17. In themanufacture of a brush of this form, the butt ends of the bristles areinserted in the channel between the annuli 12 and 13 and are seatedfirmly against the base 10 of the ferrule, the latter being then in theundeformed shape may be obtained by mounting on the central abutment acap piece 19, as illustrated in Figs. 7 to 9. Any suitable' shape may begiven this cap piece. Thus its upper surface may be gabled as in Figs. 7and 8, or it may be flat, as in Fig. 9. In either case a filler piece 20may be mounted inside the same above the strut 141 to add to theresistance which the cap offers to compression. In any case, the lowerportion of the sides of the cap which fit over the abutment are forcedtogether by the butts of the bristles on the passage of the brushthrough the reducing dies and thus serve to clamp the cap on theabutment and hold it in position during the subsequent use of the brush.The obvious advantage of the cap is that it affords a more extendedabutment than is afforded by the, strut 14 alone and thus increases thefrictional grip upon the bristles. Furthermore, the central abutment, inthis case, need not be made so high as in the forms illustrated in Figs.1 to 6 and consequently, less strain is put upon the metal of the baseduring the pressing up of the abutment.

Various other modifications of construction will readily suggestthemselves.

I claim as my invention 1. A brush having a ferrule comprising integralouter and inner annulus and base, the walls of said inner annulus beinginclined outward from the base toward the outer annulus and serving tohold the brush fibers in the ferrule channel by compression at a pointabove their butt ends, substantially as described.

2. A brush having a ferrule comprising an outer annulus, a base and aninner annulus pressed up from said base and closed by a strut member,said inner annulus in the finished brush having an inverted wedge shapeand serving by pressure at the level of said strut member to retain thebristles in the channel between said outer and inner annulus, togetherwith a cap member clamped upon said inner annulus member in the finishedbrush and serving to augment the pressure area of said strut memberabove the butt ends of the bristles.

3. A bristle gripping ferrule for a brush of the type describedhaving abase, an outer annulus and a central abutment pressed up from the base,said central abutment comprising an annulus and a strut member betweenthe upper edges thereof, substantially as described.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses.

SIMEON DESMOND PURDY.

WVitnesses:

CHARLES F. SANFORD, lVILLIAM A. EWING.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

